It's not easy to make them out in that photo but the actual fire millipedes have normal adult color at 1.5". If they don't look like the top left cover of the millipede book cover they're likely something else.Thanks, I actually kind of hope they are not the fires because the fires are easier to find. Can you identify any of the oher species? How are things going there in the UK? Hoping to have new cool new hormetica species soon.